diff --git a/include/arena.h b/include/arena.h
index 9ac0123..9424c39 100644
--- a/include/arena.h
+++ b/include/arena.h
@@ -7,6 +7,7 @@
 #include <string.h>
 
 #ifdef _WIN32
+#define WIN32_LEAN_AND_MEAN
 #include <windows.h>
 #else
 #include <sys/mman.h>
diff --git a/include/compat.h b/include/compat.h
index c1851d0..c67adbe 100644
--- a/include/compat.h
+++ b/include/compat.h
@@ -18,6 +18,7 @@
 #endif
 
 #ifdef _WIN32
+#define WIN32_LEAN_AND_MEAN
 #include <winsock2.h>
 #include <windows.h>
 #include <io.h>
diff --git a/include/progress.h b/include/progress.h
index b2c3cd2..2c4e06e 100644
--- a/include/progress.h
+++ b/include/progress.h
@@ -10,6 +10,7 @@
 #include <time.h>
 
 #ifdef _WIN32
+#define WIN32_LEAN_AND_MEAN
 #include <windows.h>
 #include <io.h>
 #define PROGRESS_ISATTY(fd) _isatty(fd)
diff --git a/src/ant.c b/src/ant.c
index 4f82f38..510fb94 100644
--- a/src/ant.c
+++ b/src/ant.c
@@ -22,7 +22,6 @@
 #include "esm/remote.h"
 #include "esm/loader.h"
 
-#include "silver/ast.h"
 #include "silver/lexer.h"
 #include "silver/compiler.h"
 #include "silver/engine.h"
diff --git a/src/errors.c b/src/errors.c
index 5d30e06..bc8279f 100644
--- a/src/errors.c
+++ b/src/errors.c
@@ -9,6 +9,7 @@
 #include <limits.h>
 
 #ifdef _WIN32
+#define WIN32_LEAN_AND_MEAN
 #include <windows.h>
 #else
 #include <unistd.h>
diff --git a/src/esm/remote.c b/src/esm/remote.c
index 0c03bd4..7d59274 100644
--- a/src/esm/remote.c
+++ b/src/esm/remote.c
@@ -13,6 +13,7 @@
 
 #ifdef _WIN32
 #include <direct.h>
+#define WIN32_LEAN_AND_MEAN
 #include <windows.h>
 #define mkdir_p(path) _mkdir(path)
 #define PATH_SEP '\\'
diff --git a/src/gc.c b/src/gc.c
index f09a05a..443cae9 100644
--- a/src/gc.c
+++ b/src/gc.c
@@ -23,6 +23,7 @@
 #endif
 
 #ifdef _WIN32
+#define WIN32_LEAN_AND_MEAN
 #include <windows.h>
 static inline void *gc_mmap(size_t size) {
   return VirtualAlloc(NULL, size, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);
diff --git a/src/modules/buffer.c b/src/modules/buffer.c
index 372bfa6..5f9b099 100644
--- a/src/modules/buffer.c
+++ b/src/modules/buffer.c
@@ -4,6 +4,7 @@
 #include <ctype.h>
 
 #ifdef _WIN32
+#define WIN32_LEAN_AND_MEAN
 #include <windows.h>
 #else
 #include <sys/mman.h>
diff --git a/src/modules/child_process.c b/src/modules/child_process.c
index 7acafef..aa5cd10 100644
--- a/src/modules/child_process.c
+++ b/src/modules/child_process.c
@@ -9,6 +9,7 @@
 #include <utarray.h>
 
 #ifdef _WIN32
+#define WIN32_LEAN_AND_MEAN
 #include <windows.h>
 #include <io.h>
 #include <process.h>
diff --git a/src/modules/date.c b/src/modules/date.c
index 6744ecc..7f1138b 100644
--- a/src/modules/date.c
+++ b/src/modules/date.c
@@ -7,6 +7,7 @@
 #include <string.h>
 
 #ifdef _WIN32
+#define WIN32_LEAN_AND_MEAN
 #include <windows.h>
 #include <sys/timeb.h>
 #else
diff --git a/src/modules/ffi.c b/src/modules/ffi.c
index 786eb8c..2ec7588 100644
--- a/src/modules/ffi.c
+++ b/src/modules/ffi.c
@@ -1,4 +1,5 @@
 #ifdef _WIN32
+#define WIN32_LEAN_AND_MEAN
 #include <windows.h>
 #define dlopen(name, flags) ((void*)LoadLibraryA(name))
 #define dlsym(handle, name) ((void*)GetProcAddress((HMODULE)(handle), (name)))
diff --git a/src/modules/napi.c b/src/modules/napi.c
index 9ccd356..b40e0e9 100644
--- a/src/modules/napi.c
+++ b/src/modules/napi.c
@@ -1,6 +1,7 @@
 #include <compat.h> // IWYU pragma: keep
 
 #ifdef _WIN32
+#define WIN32_LEAN_AND_MEAN
 #include <windows.h>
 #define NAPI_DLOPEN(name, flags) ((void*)LoadLibraryA(name))
 #define NAPI_DLSYM(handle, name) ((void*)GetProcAddress((HMODULE)(handle), (name)))
diff --git a/src/modules/os.c b/src/modules/os.c
index 2074524..006062d 100644
--- a/src/modules/os.c
+++ b/src/modules/os.c
@@ -6,9 +6,10 @@
 #include <errno.h>
 
 #ifdef _WIN32
-#include <windows.h>
+#define WIN32_LEAN_AND_MEAN
 #include <winsock2.h>
 #include <ws2tcpip.h>
+#include <windows.h>
 #include <iphlpapi.h>
 #include <lmcons.h>
 #ifdef _MSC_VER
diff --git a/src/modules/performance.c b/src/modules/performance.c
index c984d0a..d442d5d 100644
--- a/src/modules/performance.c
+++ b/src/modules/performance.c
@@ -2,6 +2,7 @@
 #include <stdlib.h>
 #include <time.h>
 #ifdef _WIN32
+#define WIN32_LEAN_AND_MEAN
 #include <windows.h>
 #else
 #include <sys/time.h>
diff --git a/src/modules/process.c b/src/modules/process.c
index 8b770b6..539c7d9 100644
--- a/src/modules/process.c
+++ b/src/modules/process.c
@@ -9,6 +9,7 @@
 #include <uv.h>
 
 #ifdef _WIN32
+#define WIN32_LEAN_AND_MEAN
 #include <windows.h>
 #include <io.h>
 #include <psapi.h>
diff --git a/src/modules/readline.c b/src/modules/readline.c
index cc51adc..62c379f 100644
--- a/src/modules/readline.c
+++ b/src/modules/readline.c
@@ -10,6 +10,7 @@
 
 #ifdef _WIN32
 #include <conio.h>
+#define WIN32_LEAN_AND_MEAN
 #include <windows.h>
 #include <io.h>
 #define STDIN_FILENO 0
diff --git a/src/modules/tty.c b/src/modules/tty.c
index dbe8667..e3bc9b4 100644
--- a/src/modules/tty.c
+++ b/src/modules/tty.c
@@ -12,6 +12,7 @@
 
 #ifdef _WIN32
 #include <io.h>
+#define WIN32_LEAN_AND_MEAN
 #include <windows.h>
 #define ANT_WRITE_FD _write
 #define ANT_ISATTY _isatty
diff --git a/src/repl.c b/src/repl.c
index bbadcc6..27f1ece 100644
--- a/src/repl.c
+++ b/src/repl.c
@@ -7,6 +7,7 @@
 
 #ifdef _WIN32
 #include <conio.h>
+#define WIN32_LEAN_AND_MEAN
 #include <windows.h>
 #include <io.h>
 #include <direct.h>
diff --git a/src/silver/limits.c b/src/silver/limits.c
index 3900b71..b365008 100644
--- a/src/silver/limits.c
+++ b/src/silver/limits.c
@@ -4,6 +4,7 @@
 #include <stdint.h>
 
 #ifdef _WIN32
+#define WIN32_LEAN_AND_MEAN
 #include <windows.h>
 #else
 #include <sys/resource.h>